Toby Bluhm wrote on Mon, 30 Jun 2008 08:54:29 -0400:
rpm -q --whatprovides /etc/pam.d/system-auth pam-0.99.6.2-3.27.el5
rpm -q --whatprovides /etc/pam.d/system-auth-ac authconfig-5.3.21-3.el5
So, possible conclusion: they want to make pam self-sufficient, thus replacing the symlink to a file that comes with authconfig with their own file.
Kai